Bsi bs en 00647 1994 (1999)

www bzfxw com BRITISH STANDARD BS EN 647 1994 Paper and board intended to come into contact with foodstuffs — Preparation of a hot water extract The European Standard EN 647 1993 has the status of a B[.]

Paper and board

intended to come

into contact with

foodstuffs —

Preparation of a hot

water extract

The European Standard EN 647:1993 has the status of a

British Standard

UDC 676.2:663/664:620.1:543.8

BS EN 647:1994

This British Standard, having

been prepared under the

direction of the Consumer and

Contract Goods Standards

Policy Committee, was

published under the authority

of the Standards Board and

comes into effect on

15 February 1994

© BSI 11-1999

The following BSI references

relate to the work on this

standard:

Committee reference CCM/47

Draft for comment 92/39056 DC

ISBN 0 580 22480 5

Cooperating organizations

The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries:

Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y

France Association française de normalisation Germany Deutsches Institut für Normung e.V

Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland

Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

© BSI 11-1999 i

Contents

Page

National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover

BS EN 647:1994

National foreword

This British Standard has been prepared under the direction of the Consumer and Contract Goods Standards Policy Committee and is the English language

version of EN 647 Paper and board intended to come into contact with

foodstuffs — Preparation of a hot water extract, published by the European

Committee for Standardization (CEN)

EN 647 was produced as a result of international discussions in which the UK took an active part

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

EUROPÄISCHE NORM October 1993

UDC 676.2:663/664:620.1:543.8

Descriptors: Paper, paperboards, food products, food-container contact, aqueous extract, preparation, leaching tests, distilled water

English version

Paper and board intended to come into contact with

foodstuffs — Preparation of a hot water extract

Papier et carton destinés à entrer en contact

avec les denrées alimentaires — Préparation

d’un extrait aqueux à chaud

Papier und Pappe vorgesehen für den Kontakt mit Lebensmitteln — Herstellung eines

Heißwasserextraktes

This European Standard was approved by CEN on 1993-10-01 CEN members

are bound to comply with the CEN/CENELEC Internal Regulations which

stipulate the conditions for giving this European Standard the status of a

national standard without any alteration

Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any

CEN member

This European Standard exists in three official versions (English, French,

German) A version in any other language made by translation under the

responsibility of a CEN member into its own language and notified to the

Central Secretariat has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium,

Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and

United Kingdom

CEN

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© 1993 Copyright reserved to CEN members

Ref No EN 647:1993 E

EN 647:1993

© BSI 11-1999 2

Foreword

This European Standard has been prepared up by

the Technical Committee CEN/TC 172 “Pulp, paper

and board”, the secretariat of which is held by DIN.

This European Standard shall be given the status of

National Standard, either by publication of an

identical text or by endorsement, at the latest by

April 1994, and conflicting National Standards

shall be withdrawn at the latest by April 1994

According to the CEN/CENELEC Internal

Regulations, the following countries are bound to

implement this European Standard: Austria,

Belgium, Denmark, Finland, France, Germany,

Greece, Iceland, Ireland, Italy, Luxembourg,

Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland and the United Kingdom

Contents

Page

1 Scope

This European Standard describes the preparation

of a hot water extract for investigations of certain

extractives in paper and board intended to come into

contact with foodstuffs

2 Normative references

This European Standard incorporates by dated or

undated reference, provisions from other

publications These normative references are cited

at the appropriate places in the text and the

publications are listed hereafter For dated

references, subsequent amendments to or revisions

of any of these publications apply to this European

Standard only when incorporated in it by

amendment or revision For undated references the

latest edition of the publication referred to applies

ISO 186, Paper and board — Sampling to determine

average quality

ISO 287, Paper and board — Determination of

moisture content — Oven drying method

ISO 536, Paper and board — Determination of

grammage

ISO 1042, Laboratory glassware — One-mark

volumetric flasks

ISO 1773, Laboratory glassware — Boiling flasks

(narrow necked)

ISO 6556, Laboratory glassware — Filter flasks

3 Definition

For the purposes of this standard, the following

definition applies

hot water extract

the water solution obtained as a result of the hot

extraction

NOTE In certain instances this extract can contain small

amounts of suspended particles.

4 Principle

The sample is torn or cut and extracted with water

for 2 h min in a water bath of (80 ± 2) °C, shaking

occasionally After extraction the extract is filtered

if necessary The extract or the filtrate (hot water

extract) is used for the investigation of the

extractives

5 Reagents

5.1 Distilled water or water of equal purity.

NOTE The quality of the water should be in accordance with

the requirements of the appropriate test method for the

determination of the specific extractive.

6 Apparatus

Ordinary laboratory apparatus and:

6.1 Balance, accurate to 0,001 g.

6.2 500 ml conical flask, wide neck with ground

glass stopper with tap (see ISO 1773)

6.3 Filtration equipment, fritted-glass filter

porosity 4 (nom size 90) with filter flask of 500 ml (see ISO 6556)

6.4 Graduated measuring cylinder, 250 ml.

6.5 One-mark volumetric flask, 250 ml

(see ISO 1042)

6.6 Protective gloves 6.7 Thermostatic water bath, suitable to control

temperature in the range of (80 ± 2) °C

6.8 Ceramic scissors (needed only for the

determination of metals)

7 Sampling

7.1 Sampling is carried out in accordance with ISO 186 Do not touch the test area of sample or test specimen with the fingers; use protective

gloves (6.6).

7.2 A minimum of 10 g of sample is required

7.3 If required, take a separate sample for the determination of the grammage in accordance with ISO 536 and/or for the determination of moisture content (see ISO 287)

8 Procedure

8.1 Tear or cut the sample as taken into pieces approx 1 cm2 to 2 cm2 Use protective gloves (6.6).

8.2 Weigh (10 ± 0,1) g of the test pieces to an accuracy of 0,01 g, put them into the conical

flask (6.2), add 200 ml (6.4) of boiling water (5.1),

and stopper the flask Leave this preparation to stand for 2 h min in a water bath of (80 ± 2) °C, shaking occasionally

Decant the solution and wash test pieces in the flask twice with water of 80 °C If necessary filter the hot

preparation (6.3) Transfer the extract and

washings or the filtrate to a marked volumetric

flask (6.5), cool to (23 ± 2) °C and fill up to the mark

with water Use the content of the flask for further investigation

NOTE If necessary, scaling up can be done but not more than twice.

8.3 Before subsampling the extract is reheated

NOTE If precipitation occurs the extract is stirred before subsampling.

0

+ 5

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© BSI 11-1999

National annex NA (informative)

Committees responsible

The United Kingdom participation in the preparation of this European Standard was entrusted by the

Consumer and Contract Goods Standards Policy Committee (CCM/-) to Technical Committee CCM/47 upon which the following bodies were represented:

Association of Metropolitan Authorities

Association of Public Analysts

British Paper and Board Industry Federation

British Plastics Federation

Ministry of Agriculture, Fisheries and Food

Pira International

Co-opted member

National annex NB (informative)

Cross-references

Publication referred to Corresponding British Standard

ISO 186:1985 BS 3430:1986 Method for sampling to determine the average quality of paper

and board

ISO 536:1976 BS 3432:1980 Method of determination of grammage of paper and board

ISO 1042:1983 BS 1792:1982 Specification for one-mark volumetric flasks

ISO 1773:1976 BS 2734:1984 Specification for boiling flasks (narrow-necked), conical, flat

bottom and round bottom

ISO 6556:1981 BS 1739:1982 Specification for filter flasks

BS EN

647:1994

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